This little poem is from Gartner's Dicteria Proverbialia (1598).
Antiquus gladius, vetus atque fidelis amicus,
Credita temporibus haec valuere suis.
The vocabulary is keyed to the DCC Latin Vocabulary list. There is only one word in this poem that is not on the DCC list:
antīquus -a -um - ancient, aged, old
amīcus -a -um: friendly; (as subst.) friend
atque, ac: and in addition, and also, and; (after comparatives) than; simul atque, as soon as
crēdo -ere crēdidī crēditum: believe
fidēlis -e: faithful
gladius -ī m.: sword
hic, haec, hoc: this; hōc, on this account
suus -a -um: his own, her own, its own
tempus -oris n.: time
valeo valēre valuī: be strong, excel, be valid, prevail; valē, farewell!
vetus veteris: old